Goodwill And Other Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 2,062	$ 2,041	$ 2,019	$ 1,941
Net carrying value of Goodwill and other intangible assets	$ 3,048	$ 3,083